I’m really not sure I know anything about your problem and I’m sure others with knowledge will see your post and reply shortly.
I looked up previous similar issues on this forum. You might wish to read through the link below and see if any of it helps point you in the right direction.
I also notice that you haven’t used Zwift for over a year. It may make no difference but have you updated Zwift to the latest version?
Hope someone else can help you out.